as red as a turkey cock

be devoid of ability(incompetent)

be a slave of pleasure

do according to one's abilities

profound in conception and succinct in language

approaching the brink of the abyss and treading on thin ice

do sth. with vigorous enthusiasm

dissension and discord

An old hand is a good guide.

harp on the same string(beat over the old ground)

grow old without achieving anything

denounce the majority opinion

never to be bored with it

have a tender heart for the fair sex

routine duties

give somebody work suited to his abilities

have a profound knowledge of something

time-tested(have proved effective every time)

the truth of something

a thief