The worst possible thing for a parent is to see their very own child consistently down and depressed, unmotivated and unhappy.. No matter where the parent is, this weighs very heavy on the heart and mind..
A happy child however, even though he/she obviously won't be perfect, and may slip and stumble, causes winds of joyous energy to constantly breathe life into the mind and heart of the parent....
We are all, one by one,no matter what we are doing, and no matter where we are, Hashems precious child...
Our happiness, simply 'because', causes Him much much nachas.
(This entire website is not so much about us 'avoiding sin' [which obviously should happen], as much as it is about us learning to rejoice and be happy with the greatest loving 'parent' in heaven)
(Um,... for any 'sharke litvaks' out there, yes, this means learning, and learning too,... But without the emmese yiddeshe simcha 1st, that won't last too long :-) )