1. Look back in the past and see that it was futile feeling insecure. This gives you strength.
2. Know that there are good people on this planet. They will always come to your help. There is a power which is going to guide you and help you out. With this wisdom and understanding, get over insecurity.
3. Third is to get rid of prejudice. There are many types of prejudice. There is prejudice between generations where young people will not sit and share with senior citizens. There is a generation gap. There is prejudice about class, about gender, about religion, culture, language, and so on in many parts of the world, so many types of prejudices. Wisdom is to rise above prejudice and see the whole world as one family.
If everyone has this idea of a "one world family", there will be no war, no crime and none of the problems that we are facing in the world today. See how many people are being killed. There is so much violence in the world. This is all because of lack of a broad vision and wisdom. With meditation, yoga and breathing techniques, get over stress.
With wisdom, get over prejudice, and reflecting on your own life and having the confidence and faith, get over insecurity. Once you get over stress, insecurity and prejudice, then you are like a child, full of joy, and happiness simply wells up in you.
Happiness is already there, it is just covered by these three things, and once you removed all these three things, it becomes obvious.