An idle brain is the devil's workshop
 One who has nothing to do will be tempted to do many mischievous acts.
In for a penny, in for a pound If we decide to do something, we should commit ourselves to it boldly and completely.
 If at first you don't succeed, try, try again Never stop trying to succeed at something
If it's not one thing it's another The troubles seem to go on and on without end.
If the blind lead the blind, both shall fall into the ditch Those without knowledge should not try to teach the ignorant.
If the shoe fits, wear it If something said about you is true, you should accept it.
If wishes were horses, beggars would ride If we could get all the things we wanted just by making a wish, everyone would have all he ever wanted.
If you buy cheaply, you pay dearly Cheap goods are usually not the best in terms of quality
If you buy quality, you only cry once Items of good quality may be expensive, but they will last you a long time
If you can't lick them, join them If you cannot defeat an opponent or get him to change his ideas, plans or way of doing things, the best thing is to change your ideas, plans, etc.
If you can't take the heat, get out of the kitchen If you cannot handle something, give it up
If you don't buy a ticket, you can't win the raffle If you do not take the risk, you cannot expect success
If you don't have anything nice to say, don't say anything at all Avoid being negative
If you keep your mouth shut, you won't put your foot in it Keep quiet, and you will say nothing wrong
If you want a thing done right, do it yourself Do not rely on others to complete your work for you
If you were born to be shot, you'll never be hanged You cannot escape your fate
If you're in a hole, stop digging Do not create more trouble for yourself when you are already facing some
Ignorance is bliss You can be happy when you do not know there are problems around you
Ignorance of the law excuses no man Not knowing what you did was wrong does not excuse you from suffering the penalty
Imitation is the sincerest form of flattery When someone copies what you do, it means they really admire you or the way you do things
It's a blessing in disguise When an opportunity arrives through a crisis etc.
It's an ill wind that blows nobody any good A bad or evil occurrence.
It is best to be on the safe side Play safe, and be prepared for the worst to happen
It's better to give than to receive Giving is more blessed than receiving
It's better to have loved and lost than never to have loved at all Do not be afraid to fall in love
It's never too late to mend It is never too late to correct one's mistakes or faults.
It's no use crying over spilt milk It is pointless to feel remorseful over a thing lost that can never be found or a mistake done that can never be corrected or rectified.
It is useless to flog a dead horse It is no use spending your time and energy on an activity or belief that is already widely rejected or outdated.
It never rains but it pours Events, especially misfortunes, always come together and not one at a time.
It takes all sorts to make a world You should not expect everyone to think and act as you do.
It takes two to make a quarrel Both parties in a quarrel should share the blame or take responsibility for it; no one can start a quarrel all by himself.
It takes two to tango It takes two individuals to do certain things