I am a bard; I will not disclose secrets to slaves;
I am a guide: I am expert in contests.
If he would sow, he would plough; he would plough, he would not reap.
If a brother among brothers,
Didactic Bards with swelling breasts will arise
Who will meet around mead-vessels,
And sing wrong poetry
And seek rewards that will not be,
Without law, without regulation, without gifts.
And afterwards will become angry.

Book of Taliesin (c. 1275?) - The First Address of Taliesin