The Prophet said "None of you will have faith till he loves me more than his father, his children and all mankind." Narrated Anas: Volume 1, Book 2, Number 14:
And they have been commanded no more than this: To worship Allah, offering Him sincere devotion, being true (in faith); to establish regular prayer; and to practise regular charity; and that is the Religion Right and Straight. Surah 98 Verse 5