When people of dark nature are in control, keep you inner light. It will manifest subtly through your intentions and your works. Do not be too obvious so as to attract attention and become a target for nefarious attacks.
Read the text from Richard Wilhelm's translation of the I Ching
“One must not unresistingly let himself be swept along by unfavourable circumstances, nor permit his steadfastness to be shaken. He can avoid this by maintaining his inner light, while remaining outwardly yielding and tractable. With this attitude he can overcome even the greatest adversities. In some situations indeed a man must hide his light, in order to make his will prevail in spite of difficulties in his immediate environment. Perseverance must dwell in inmost consciousness and should not be discernible from without. Only thus is a man able to maintain his will in the face of difficulties. ”