Survival of any relationship for long time is very difficult without presence of a trust in it. Many relationships die very soon after their start because people fail in trusting each others. It takes long time to develop a good level of trust in any relationship; however, it takes just minutes to convert this trust in to distrust. Life is a complex journey and mostly people lack ability to trust others.
This nature of people makes it very hard for people to trust other persons entering through a new relationship. Many times in life, we see numbers of people breaking our trust so these past memories also stop us from trusting others. Too much of individual ego also put problems in developing trust in a relationship. Moreover, developing trust is a two ways effort and efforts from only single partner can never result in developing a strong trust.
Good understanding among individuals is also quite important for developing a trust because when we can understand other partner then we can work in direction to create a level of trust. When we succeed in developing a strong relationship then we enjoy a strong and healthy relationship which in return makes us a strong and healthy personality.