Hi, OctavO! Welcome.
"No matter how long you stay in the forest in retreat, if its effect on you is just to produce haughtiness, you are using Dharma to cultivate more obscurations. If its effect is arrogance and not caring about anybody else, then there is something wrong. The medicine has become poisonous...If you scorn others you will not attain emancipation..." Geshe Lhundub Sopa, Steps on the Path to Enlightenment: A Commentary on Tsongkhapa's Lamrim Chenmo, Vol. 1 (Somerville: Wisdom Publications, 2004), pp. 456-457.
"Blind faith is not a valid basis of trust." ibid. p. 458.