"Almost all of us consider our thoughts to be simple and natural, therefore, we spontaneously rely on them. On the contrary, we should neither trust, nor accept them. We must not have any thoughts in our mind or heart, neither positive ones, nor negative ones, for this space inside us belongs to the grace of God. We are obliged to keep it clean, not only of our various thoughts but also of the slightest and most elusive slip of the mind. We can only achieve this, if we fervently love Christ and unhesitatingly trust Him. As a result, we humble ourselves, and divine grace, naturally, will be revived inside us, for it is only granted to the humble ones; "God opposes the proud, but gives Grace to the humble." (1 Peter 5:5).
Elder (Saint) Paisios of the Holy Mountain