What does tomorrow will be better mean?

Start the new week by putting aside all the sorrows of the old—

Start the new day commending yourself to God and thinking—

This day is going to be better than the last. 

Do that every day—if some of the days do not respond quite as much as they should, do not lose heart, still say—

Tomorrow will be better. 

The days are going to be better in a way you little understand—better and brighter and more akin to the things that are of the spirit, for sorrow has no place over here [in the world of spirits]. Spirits just gather up the gold that the mould of sorrow has brought to the surface, and with this treasure, they go on their way rejoicing, regretting nothing, hoping all things, and finally, reaping that which was sown in ignorance and in darkness.

—Zodiac, the Christ Messenger