You should never trust the faithless, nor should you trust too much those that are faithful. If fear (enmity) is engendered in a man whom you trust, your root may be destroyed (your total ruin may come).
न विश्वसेदविश्वस्ते विश्वस्ते नातिविश्वसेत्। विश्वासाद् भयमुत्पन्नं मूलान्यपि निकृन्ततिः॥