"If ye then, being evil, know how to give good gifts unto your children, how much more shall your Father which is in heaven give good things to them that ask him?" -Matthew 7:11, KJV.
God is our ultimate Father, and, as He is sinless, He is the only perfect One. Even as we earthly fathers want what's best for our children, so He wants the best for us. God knows exactly what we need when, and is judicious in giving us gifts. God is the best Father we can ever know, and He truly deserves our worship and thankfulness this Father's Day.