Today

Plant the good seeds of righteousness and you will reap a crop of my love; plow the hard ground of your hearts, for now is the time to seek the Lord, that he may come and shower salvation upon you.

Hosea 10:12
The Living Bible

Tomorrow is never a good time to do a good thing, especially a spiritual thing, for tomorrow always seems to get blown away by the wind of today's interruptions. Do it now. Repent. Pray. Witness. Say I love you. Write a thank you note. Forgive. Apologize. Whatever good thing you have to do. Do it today.