[CynicalBear]

>>Every Catholic belief is fully supported in the Holy Bible.<<

Please show where the apostles taught the assumption of Mary.

[SpirituTuo]

This will give you a great starting point.

http://w2.vatican.va/content/pius-xii/en/apost_constitutions/documents/hf_p-xii_apc_19501101_munificentissimus-deus.html