Every small honest decision lowers the cost of the next one.

The first honest decision in a given situation is the expensive one. It sets a precedent, both with other people and with yourself, and after that the honest path is simply what you do here. Each repetition lowers the price, which is why integrity tends to get easier rather than harder over time.

When an honest choice feels costly, remember that you are paying for more than this instance. You are buying a lower price on every version of it that follows.