It means,
He respects your principles as his,
And never plays with them.
It means,
He honors your faith,
Without tempering with it.
It means,
He gives his soul to you,
To guard it.
It means,
Not losing your self respect,
But giving your self respect to him,
And He will never abuse it.
It means,
Handling his secrets,
Knowing you will never whisper them again,
Even to yourself.
Love,
It means,
You are not tradable,
With anything.