vāyor iva suduṣkaram

cancalam-flickering; hi-certainly; manah-mind; krsna-O Krsna; pramathi-agitating; balavat-strong; drdham-obstinate; tasya-its; aham-I; nigraham-subduing; manye-think; vayoh-of the wind; iva-like; suduskaram-difficult.