We reap what we sow

Charity bestowed upon those who are worthy of it is like good seed sown on a good soil that yields an abundance of fruits. But alms given to those who are yet under the tyrannical yoke of the passions are like seed deposited in a bad soil. The passions of the receiver of the alms choke, as it were, the growth of merits. Every adversity, every failure, every sorrow carries with it the seed of an equal or greater benefit.