Real and continued success is a mathematical result which any man or woman may obtain if he or she is willing to work carefully enough and long enough. When a women adds six and six together she is dead sure of twelve as the result - if she makes no mistake.
Life is a still-hunt for the factors of success. If we use the wrong factors the Great Teacher, Experience, wipes out our work and we have to do it all over again.
This process is repeated until our wits are sharpened enough to find the right factors. Then success abides with us.