SB 11.13.12
rajas-tamobhyam yad api
vidvan viksipta-dhih punah
atandrito mano yuñjan
dosa-drstir na sajjate
Translation:
Although the intelligence of a learned person may be bewildered by the modes of passion and ignorance, he should again carefully bring the mind under control. By clearly seeing the contamination of the modes of nature, he does not become attached.