1.
Shmuli Feldman asks:
Why does it say in the passuk יושב בשמים ישחק with a ש instead of a צ and what would be the distinction in using each letter
Shmuli
2.
The Kollel replies:
In general, "Yitzchak" means "laughter" and "Yischak" means happiness.
Shimon Brodie