Mark the Ascetic - On the Spiritual Law 83-85

83. Ignorance of words will do no harm to the truly devout, nor will wisdom in speaking harm the humble.
84. Do not say: 'I do not know what is right, therefore I am not to blame when I fail to do it.' For if you did all the good about which you do know, what you should do next would then become clear to you, as if you were passing through a house from one room to another. It is not helpful to know what comes later before you have done what comes first. For knowledge without action 'puffs up', but 'love edifies', because it 'patiently accepts all things' (1 Cor. 8:1; 13:7).
85. Understand the words of Holy Scripture by putting them into practice, and do not fill yourself with conceit by expatiating on theoretical ideas.