You reap what you sow.
You reap where you sow.
(You can’t sow all of yourself into work and expect to reap from your family)
You reap after you sow.
You always reap more than you sow.
You can sow: time, sweat, effort, material
-Pope
Prime concern
...ignoring all the things you could do and doing what you should do. ...recognizing that not all things matter equally and finding the things that matter most.