Think before you speak. Read before you think, meaning that what we say should be well-informed verified knowledge, and you should carefully examine the words before you tell them, making sure that they won't hurt someone.
Speaking is an inalienable characteristic of humans. Speaking is essential to everyone's life. It is a veritable tool through which knowledge is passed and the expression of thoughts is made possible. It is, therefore, important that what you say is well-informed and backed up by veritable sources. Our speech heavily relies on our thoughts, and several factors influence our thoughts. The only way to get past these influences and access an absolute, objective truth is to consider perspectives other than ours. You must learn to look at things holistically instead of seeing them in bits and pieces. To get around this, you must read many books and take the entire course. It is also essential to evaluate what you want to say before expressing your opinion. Words have a lot of power, and if they are misused, they can hurt someone forever. Speaking without thought can hurt or give the wrong direction or information to the listener.
On this note, you should think before you speak and read before you feel well informed, have a bird's eye view of what you say, and enlighten listeners with your words.