The mind can settle down, be with the breath in the present moment, and simply breathing in and breathing out is a refreshing experience, an energizing experience, a calming experience: whatever the mind needs at that time.

"This is when the quality of the heart begins to grow — when you do have a sense of well-being that comes from the practice. The mind can settle down, be with the breath in the present moment, and simply breathing in and breathing out is a refreshing experience, an energizing experience, a calming experience: whatever the mind needs at that time. When you’ve got your own true happiness covered, then it’s a lot easier to have a warm feeling for other people. You feel sorry for them because they’re missing out on the food you’ve got."

~ Thanissaro Bhikkhu "Goodwill in Heart & Mind"