“Without trust it is impossible to build relationships. But never bet your reputation on blind trust. Because even a friend can potentially become a traitor, when he is blinded by greed and ego.”
Related quotes

“Blind when I gave him such a trust, nor saw
How easily the fire consumes the straw.”
Cieco a dargline impresa, e non por mente
Che 'l fuoco arde la paglia facilmente.
Canto XXIV, stanza 39 (tr. W. S. Rose)
Orlando Furioso (1532)

“Trust and faith bring joy to life and help relationships grow to their maximum potential.”
Source: Battlefield of the Mind: Winning the Battle in Your Mind

Quoted in Questions & Answers, Share International https://www.share-international.org/magazine/old_issues/2018/2018-10.htm#q-n-a (October 2018)
Share International Magazine

"Suzanne" - Isle of Wight performance (1970) http://www.youtube.com/watch?v=n_56ep729TE - Live in London (2008) http://www.youtube.com/watch?v=snMOmHzgssk
Songs of Leonard Cohen (1967)
Context: Suzanne takes you down to her place near the river.
You can hear the boats go by,
You can spend the night beside her,
And you know that she's half crazy
But that's why you want to be there,
And she feeds you tea and oranges
That come all the way from China.
And just when you mean to tell her
That you have no love to give her
Then she gets you on her wavelength
And she lets the river answer
That you've always been her lover.
And you want to travel with her,
And you want to travel blind,
And you know that she will trust you,
For you've touched her perfect body with your mind.