The true aim of serving GD is not for the sake of reward or fear of punishment, yet "for His sake, alone" Man's desire to follow what H'shem has commanded him to do and not do should be "To draw near to Him"
pg 439
Nefesh Hachaim
"The continued existence of all the worlds depends completely on H'shem. If He would cease to will their continued existence they would revert to absolute nothingness in an instant"
Gate Three, Chapter 1 pg 109