It seems to me that self confidence and the ability to stand one's ground are essential if we want to succeed in life. I am not talking of stupid self-assurance but of an awareness of our inner potential, a certainty that we can always correct our behavior, improve ourselves, enrich ourselves, and that things are never hopeless
How was I able to live alone before, my little everything? Without you I lack self-confidence, passion for work, and enjoyment of life--in short, without you, my life is no life. [Written to his wife, Mileva]
Each of you should feel that you have great potential and that, with self-confidence and a little more effort, change really is possible if you want it. If you feel that your present way of life is unpleasant or has some difficulties, then don't look at these negative things. See the positive side, the potential, and make an effort.
The very purpose of our life is happiness, which is sustained by hope. We have no guarantee about the future, but we exist in the hope of something better. Hope means keeping going, thinking, ‘I can do this.’ It brings inner strength, self-confidence , the ability to do what you do honestly, truthfully and transparently.
Developing concern for others, thinking of them as part of us, brings self-confidence , reduces our sense of suspicion and mistrust, and enables us to develop a calm mind.