One who trusts in GD if he has more then what he needs, he uses it to serve H'shem "with a generous and cheerful heart"
pg 451
Nefesh Hachaim
One way the Yetzer Hara trips us up is by telling us to prepare for a Mitzvah, as much as possible to be in the right mindset of Kedusha, so much so we miss the Zman of the Mitzvah. He will tell us it is fine, not to worry about the time. "Ultimately you will be left with having done the mitzvah neither at its set time nor with the proper Kavanah"
Prologue to Gate Four Chapter 4 125/126