The definition for Vanity is Vapor trying to obtain Life in this temporal world is like trying to grab and hold on to a vapor . James 4:14 says what is your natural mortal life? Its even as a vapor it appears and then vanishes away ? The vain imagination is an imagination that filled with things that can not give the kind of Zoe Life that we were created for . 1 Timothy 6:12 says that we are to fight the good fight of faith where we can actually lay hold of eternal life the life that we were created for is not vain and is not a vapor ...Its the zoe kind of life that is also a physical glorified life that will never perish