Be vigilant; guard your mind against negative thoughts.

How cautious we must always be when faced with those who, far beyond observing deeds, can gaze in wisdom on our very thoughts.

Guard well your thoughts when alone and your words when accompanied.

Prepare your mind to live in the company of evil people, with your mind unsullied; to do this is to live like an angel.

Every day, stand guard at the door of your mind.

When people think the world of you, be careful with them.

Everyone needs a warm personal enemy or two to keep him free of rust in the movable parts of the mind.

Even when called out By a single foe, Remain on guard, For you are always surrounded By a host of enemies

One should attend to one's enemies, for they are the first persons to detect one's errors.

Take care not to hurt the ruling faculty of your mind. If you were to guard against this in every action, you should enter upon those actions more safely.

As persons living in a house infested by venomous snakes are always alert and cautious, so should men living in the world be always on their guard against the allurements of lust and greed.

Keep violence in the mind where it belongs.

To ruminate upon evils, to make critical notes upon injuries, and be too acute in their apprehensions, is to add unto our own tortures, to feather the arrows of our enemies, to lash ourselves with the scorpions of our foes, and to resolve to sleep no more.

I think people need to mind their business, and they should be mindful of what they say to others, especially because they do not know what others are going through.