That single thought is enough. The impulse increases to a wish, the wish to a desire, the desire to an uncontrollable longing, and the longing (to the deep regret and mortification of the speaker, and in defiance of all consequences,) is indulged.
The Buddhas, the World-Honored Ones, for one great cause alone appear in the world. The Buddhas, the World-Honored Ones, appear in the world because they wish to cause the beings to hear of the Buddha's knowledge and insight and thus enable them to gain purity. They appear in the world because they wish to demonstrate the Buddha's knowledge and insight to the beings. They appear in the world because they wish to cause the beings to understand. They appear in the world because they wish to cause the beings to enter into the path of the Buddha's knowledge and insight.
if a person wishes to achieve peace of mind and happiness then they should acquire faith, but if they want to be a disciple of truth, which can be "frightening and ugly,” then they need to search.