Add punctuation: But I beseech you brethren bear the word of exhortation for it is but in few words that I have written to you
A: But I beseech you, brethren, bear the word of exhortation, for it is but in few words that I have written to you.

Add punctuation: My position was then clearly man is good by nature and only the circumstances make it a suffering beings
A: My position was then clearly: man is good by nature and only the circumstances make it a suffering beings.

Add punctuation: In 1781 the Palace hosted Cardinal Corsini during his pastoral visit
A:
In 1781 the Palace hosted Cardinal Corsini during his pastoral visit.