But because I do not promise even the other kind of readers that I will satisfy them throughout on first reading, nor am I so arrogant as to be sure that I can foresee everything that will seem difficult to anybody, I shall first explain in these Meditations the particular thought processes by the help of which I think I have attained the certain and evident knowledge of truth, so that I may test whether, perhaps, I can convince other people by the same arguments as I have convinced myself.