Our Lord speaks of Fasting..
"Whenever you fast, don't be gloomy like the hypocrites. For they put on sad faces to show others they are fasting. Truly I tell you, they have their full reward! But when you fast, put oil on your head and wash your face, so that your fasting will not be noticed by others but by your Father who sees in secret. And your Father who is in secret will reward you."
"Stop storing up treasures for yourselves on earth, where moths and rust destroy and where thieves break in and steal. But keep on storing up treasures for yourselves in heaven, where moths and rust do not destroy and where thieves do not break in and steal.
For where your treasure is, there your heart will be also."
Matthew 6: 16-21