主句是happy is the man,其中,
the man：主语；
is系动词作谓语；
happy：表语；
to whom it is granted to make even one such discovery是定语从句,修饰the man.在定语从句中,
it：主语；
is granted to：谓语（被动语态）；
whom：宾语；
to make even one such discovery：目的状语
不明白的再问哟!请记得采纳,多谢!