Can't, if, and, maybe, but, are five words that should be eliminated from the language, because these words more often than not profess the negative. These five words have cause many not to even try anything new. They have also kept many from realizing their true potential or from ever attaining any real level of achievement.
A positive approach is to state to yourself in going after what you want in this life is; "I CAN!" with no ifs, ands, maybes, and no buts.
To express the truth to someone and the first word out of their mouth is, "But, or If, And, or maybe.
This is something you can check out for yourself in any conversation that you may have, notice how many times these are used and how many times a day you used the words yourself.