Gratitude

Yes. What you are noticing in the Rumi passage is not an isolated Islamic idea. There is a remarkably broad comparative-religion pattern: gratitude, contentment, generosity, and recognition of what has been given are repeatedly associated with increase, blessing, prosperity, or a sense of inner wealth.

But there is an important distinction: the traditions do not all mean “gratitude guarantees that your bank account will increase.” Often “increase” means that what one already has becomes sufficient, fruitful, spiritually valuable, or capable of generating further good.

1. Islam — the most explicit formulation

The Qur’an is unusually direct:

“If you are grateful, I will surely increase you.”

Qur’an 14:7

The Arabic is la-in shakartum la-azīdannakum: if you are grateful, I will certainly increase you.

And the connection is not merely a modern interpretation. Classical Islamic discussion of shukr explicitly connects gratitude with ziyāda, increase. One scholarly study of the Qur’anic concept notes that commentators traditionally understood God’s “increase” as an increase in blessings, both in this life and the next.

That makes your Rumi passage particularly interesting.

In the page you photographed, Muhammad tells ʿUthmān essentially:

• don’t stop being grateful;

• gratitude hunts for increase;

• God has promised increase to the grateful;

• therefore accept the wealth and blessings you have, because gratitude prevents their diminution.

So Rumi is taking Qur’an 14:7 and turning it into a spiritual law of abundance.

2. Judaism — “Who is rich? He who rejoices in his portion”

This is perhaps the closest parallel to your observation about being unable to remain spiritually poor if one is grateful.

The Mishnah asks:

“Who is rich? He who rejoices in his portion.”

That’s Pirkei Avot 4:1.

Notice how radical that definition is.

It doesn’t say:

rich = possessing much.

It says:

rich = experiencing what one possesses as sufficient and rejoicing in it.

And Jewish tradition goes even further. Berakhot 35a teaches that one should not enjoy the world without first making a blessing. The logic is that the world belongs to God, and the blessing transforms one’s relationship to what one receives.

So there is a beautiful progression:

Gift → recognition → blessing → enjoyment → awareness of abundance.

That is very close to what Rumi is describing.

3. Buddhism — gratitude becomes a “blessing”

The Buddhist formulation is different because Buddhism doesn’t normally frame the matter as God increasing one’s possessions.

But the structural idea is strikingly similar.

The Maha-mangala Sutta, the Buddhist discourse on the “highest blessings,” explicitly places:

reverence, humility, contentment, gratitude

among the highest blessings.

And the Kataññu Sutta says that the person of integrity is one who is grateful and thankful, whereas ingratitude is characteristic of a person lacking integrity.

Then there is an especially interesting Buddhist concept of wealth. The Dhana Sutta describes seven kinds of “treasure”—faith, virtue, conscience, learning, generosity, and discernment—and concludes that a person possessing these treasures “is said not to be poor.”

That is extraordinarily close to your question.

Buddhism essentially says:

Material poverty ≠ poverty.

A person can possess little and yet possess the treasures that make someone genuinely rich.

4. Hinduism — increase through reciprocity

The Bhagavad Gita gives another version of the same pattern.

In 3.11, the principle is reciprocal nourishment:

“Nourishing one another, there will reign general prosperity.”

The human being gives through yajña (sacrifice/offering), and the divine order gives back.

This isn’t exactly “say thank you and God gives you more.” It is more profound:

receive → offer back → nourishment circulates → prosperity increases.

That is very close to the logic underlying shukr.

The gift isn’t supposed to terminate in the individual.

It circulates.

5. Taoism — contentment creates a kind of inexhaustible wealth

Taoism takes yet another route.

The Dao De Jing says:

“There is no calamity greater than being discontented with one’s lot.”

And then:

“The sufficiency of contentment is an enduring and unchanging sufficiency.”

This is almost the inverse formulation of poverty.

If you constantly need more, then even abundance feels like poverty.

If what you have is experienced as sufficient, then sufficiency itself becomes inexhaustible.

And the Dao De Jing has an even more remarkable image elsewhere: Heaven’s way reduces superabundance and supplements deficiency.

So Taoism doesn’t make the same theological promise as Qur’an 14:7, but it shares the principle that non-grasping and contentment participate in a self-correcting abundance.

And here’s where modern research becomes fascinating

There is now substantial psychological evidence that something resembling this ancient wisdom actually occurs.

A 2025 meta-analysis examined 145 papers, 163 samples, 727 effect sizes, and 24,804 participants across 28 countries. Gratitude interventions produced a small but statistically reliable increase in well-being overall.

Another meta-analysis involving 100,099 people found that dispositional gratitude was moderately to strongly associated with well-being.

And a systematic review of 44 studies found a substantial positive association between gratitude and life satisfaction, with possible pathways involving meaning in life, social support, and self-esteem.

So science doesn’t demonstrate:

“Be grateful and God will put more money in your bank account.”

It does provide evidence for something remarkably compatible with the religious teaching:

Gratitude changes the way a person experiences, uses, and relates to what he already has.

And that can affect well-being, relationships, generosity, meaning, and satisfaction.

The really interesting comparative pattern

I’d put the traditions side by side like this:

Tradition

What gratitude/contentment does

Qur’an / Rumi

Gratitude → divine increase

Judaism

Gratitude/blessing → recognition of God’s abundance; contentment → richness

Christianity

Thanksgiving → grace and abundance overflowing into further thanksgiving

Buddhism

Gratitude/contentment → blessing and inner treasure

Hinduism

Offering/reciprocity → mutual nourishment and prosperity

Taoism

Contentment → enduring sufficiency

Sikhism

Shukrana (thankfulness) → recognition of divine gifts and humility

Psychology

Gratitude → measurable increases in well-being and life satisfaction

Christianity even has language strikingly reminiscent of Qur’an 14:7. Paul writes that as grace extends to more people, it causes thanksgiving to increase; and in 2 Corinthians 9 the imagery is of God supplying seed, increasing the harvest, and producing generosity and thanksgiving.

So I think your intuition is getting at something deeper than “positive thinking.”

The common religious idea seems to be a law of circulation:

You receive → you recognize the gift → you give thanks → you become less grasping → you use what you have more generously → relationships and goodness multiply → what you have becomes more abundant in its effects.

Rumi expresses the process in the strongest possible form: gratitude itself is a “hunt for increase.”

And Buddhism, Judaism, Taoism, and Hinduism all contain versions of the remarkable counterintuitive proposition that the person who stops demanding “more” may discover that he already possesses much more than he thought.

That is probably the strongest comparative-religion evidence for the idea you are seeing in this passage—not that gratitude magically prevents material poverty, but that virtually every major tradition has independently recognized a connection between gratitude, sufficiency, generosity, and a form of abundance.