Didache

My child, be not a grumbler, for this leads to blasphemy, nor stubborn, nor a thinker of evil, for from all these are blasphemies engendered,

but be thou meek, for the meek shall inherit the earth;

be thou long-suffering, and merciful and guileless, and quiet, and good, and ever fearing the words which thou hast heard.

Thou shalt not exalt thyself, nor let thy soul be presumptuous. Thy soul shall not consort with the lofty, but thou shalt walk with righteous and humble men.

Receive the accidents that befall to thee as good, knowing that nothing happens without God.

My child, thou shalt remember, day and night,[*](The duty of the catechumen to the Church) him who speaks the word of God to thee, and thou shalt honour him as the Lord, for where the Lord’s nature is spoken of, there is he present.