If ye dinna see the bottom, dinna wade.
If you do not see your way clearly through an undertaking, do not venture on it at all.
If ye do nae ill, dinna be ill like: if ye steal na my kail, breakna my dike.
"He that would no evil do, must do nought that's like thereto."—English.
If ye gang a year wi' a cripple, ye'll limp at the end o't.
For "Evil communications corrupt good manners."
If ye had as little money as ye hae manners, ye would be the poorest man o' a' your kin.
If ye'll blaw your ain whistle, ye maun uphaud the win'.
If you had been anither, I would hae denied you the first word.
Meaning that you are granted more indulgence than another would be if similarly situated.