The veneration of the relics of the saints is rooted in several Biblical truths, as well as in the Tradition of the Church.
1). Unlike the pagan Greeks, we believe in the goodness of creation. As we are told in Genesis 1:31, when God completed his work of creation:
"And God saw every thing that he had made, and, behold, it was very good."
Consequently, we believe that God can and does use material things to impart grace, as is seen throughout both the Old and New Testaments.
2). God honors those who honor him.
"for them that honor me I will honor, and they that despise me shall be lightly esteemed" (1 Samuel 2:30).
"if any man serve me, him will my Father honor" (John 12:26).
"Wondrous is God in His saints; the God of Israel, He will give power and strength unto His people. Blessed is God" (Psalm 67:35 LXX).
3). God has worked miracles through the relics of the saints in Scripture.
We are told that when the Prophet Elijah was taken up to heaven in fiery chariot, his mantle fell to the Prophet Elisha:
"And he took the mantle of Elijah that fell from him, and smote the waters, and said, Where is the Lord God of Elijah? an