They cannot commit their faithfulness to you if they are, themselves, lost. Like my mother says; "You cannot mix oil with water."
Ecclesiastes
26 And I find something more bitter than death: the woman whose heart is snares and nets, and whose hands are fetters. He who pleases God escapes her, but the sinner is taken by her. 27 Behold, this is what I found, says the Preacher, while adding one thing to another to find the scheme of things— 28 which my soul has sought repeatedly, but I have not found. One man among a thousand I found, but a woman among all these I have not found. 29 See, this alone I found, that God made man upright, but they have sought out many schemes.
The Following is quoted from Grace Fellowship Church (Toronto, Ontario)
1. There is no true joy in pleasure alone
There is no joy in cheer (laughter, wine, folly) 2:1-3
There is no joy in possessions 2:4-7
There is no joy in entertainment 2:8-9
There is no joy in massive abundance of all of these 2:10-11
We must be productive and fruitful!
2. There is no true joy in wisdom alone
The wise and the fool both die in the end 2:12-17
3. There is no true joy in working to amass wealth alone
You may lose it... or your son will 2:18-23
Life is nothing but futility and frustration unless you embrace the sovereignty of God and the responsibility of man. 3:1-5:20
God's plan embraces all things 3:1-15
Man, plants and states all have a fixed term of life 3:1-3
Man can only react to sovereign events 3:4-8
All the work in the world cannot change God's plan 3:9
Yet this plan is beautiful and God has put it into man's heart to want to figure it out 3:10-11
http://www.gfcto.com/2006/11/ecclesiastes.php
