Matthew 6:20 (KJV)  But lay up for yourselves treasures in heaven, where neither moth nor rust doth corrupt, and where thieves do not break through nor steal:

Esteem the eternal over the things temporal. Lay up for yourselves treasures in heaven.

It is the safe and secure thing to do for the temporal treasures of this world can be corrupted and thus does not have everlasting value. What is truly valuable must be eternal.

In all our seeking, therefore, seek the heavenly things that neither moth nor rust doth corrupt, where thieves do not break through and steal. For where your treasure is, there will your heart be also. Amen.