The smallest seed of faith is better than the largest fruit of happiness.

A small amount of trust in something outlasts a large amount of good feeling, because feeling is weather and trust is structure. Whatever you actually lean on when things go badly does more work than any quantity of contentment accumulated while things went well. That holds whether what you lean on is religious or entirely ordinary.

Worth knowing what yours is before you need it. Ask what held you up during the last hard stretch, and treat that as something to maintain rather than something that will simply be there. Good feeling is not a reserve you can draw on later.