When you are warm-hearted, there is no room for anger, jealousy or insecurity.
Cultivating a close, warmhearted feeling for others automatically puts the mind at ease. It helps remove whatever fears or insecurities we may have and gives us the strength to cope with any obstacles we encounter.
The greatest antidote to insecurity & sense of fear is compassion. It brings one back to the basis of one's inner strength.
According to my own experience, the highest level of inner calm comes from the development of love and compassion. The more concerned we are with the happiness of others, the more we increase our own well-being. Friendliness and warmth towards others allow us to relax and help us to dispel any sense of fear or insecurity so we can overcome whatever obstacles we face.