Assuming the sonnet is an envoy or "ambassage", a submission of a vassal seeking preferment from a Lord, we are presented with a pastiche of ink-horn terms. The plainant extols the Lord's "merit" and, disingenuously, his own meagre abilities, his "wit".
Assuming the sonnet is a messenger or "ambassador", a submission by a vassal seeking advancement from a Lord, we are presented with a mixture of old-fashioned language. The plaintiff praises the Lord's merits and, deceptively, his own modest talents, his "wit".