Is being sensitive and having a selfless attitude a weakness in this world?

No, no, not at all!
It is in fact one of the greatest strengths in this world.

Being sensitive to others’ pain and having a selfless attitude to help people...
Param Pujya Dada Bhagwan, an enlightened being states, “The act of benevolence is the highest of all human activity. Benevolence and helping others is the goal of human life.”

One who is genuinely benevolent, by his inherent nature, is bound to be kind and sensitive to others’ problems. And those who are sensitive to others’ problems generally have a selfless attitude; they do not mind or even remember their own problems; rather they are busy, striving to help people come out of their miseries to the best of his ability.

Hence Param Pujya Dadashri suggests:
“Give to others whatever you have. In this manner, your life will become ideal and harmonious (satvik).... Lord Mahavir says, ‘Use your mind, speech, body and soul (worldly self) for others. If then you experience any pain, let me know.’ Religion begins with an obliging nature. Happiness is found in giving to others. But instead people tend to take away from others. Do not do anything for yourself. When you do for others, you will not have to do anything for yourself.”

Through an illustration of the tree, Dadashri makes us understand how every living being’s life should be:
“Do any of the fruit trees eat their own fruits? No. These trees teach human beings to give their fruits to others. When you do this, nature in turn will reward you. The Neem tree is very bitter, yet people grow it because of its many benefits; otherwise, they would uproot it. It is beneficial in many ways: it is cooling to the body, it has medicinal value and its extracts have healing properties. In Satyug (past time cycle characterized by unity in thoughts, speech and acts), people strived only to make others happy. They would be constantly thinking of ways to oblige others.”

Is being sensitive and having a selfless attitude a weakness in this world?
The one who is truly serving others is not concerned with whether or not people understand it as one’s weakness or strength. He is not concerned at all with how the other person sees or interprets his this act to be.

Here, Pujya Dadashri explains, “If he were, then he would become judgmental. Therefore, one should not look for understanding from others. This mango tree here has so many fruits on it, yet how much of its own fruit does the tree itself enjoy?”

Not even a single one.
So then who are the fruits for?
They are all for others. Moreover, the tree does not take into consideration whether a person enjoying its fruit is kind or unkind? For the tree, the fruit belongs to whoever takes it; its life is lived for serving others.

By living in this manner, every living entity gradually progresses to a higher life form

Thus, Param Pujya Dadashri advises, “Do not think about your daily needs at all. You will not encounter any obstacles in your life if you help others in any way. People do not understand the science behind this. When a person begins to serve others with only half the understanding, he is rewarded with a contrary result and, therefore, he loses faith in serving others.”

But if one were to serve others now (in this lifetime), he will reap the rewards of that service later. This is the very ‘Science.’

What is the purpose of this human life?
The ultimate purpose of this human life is to break this bondage of life after life. This human life is for attaining eternal liberation from the bondage of karma. It is for the purpose of becoming ‘Absolute’ i.e. fully enlightened. For this, we must acquire Self-Realization.

And until one does not get the opportunity to attain the knowledge of Self-Realization and progress on the path of ultimate liberation, one should live for others. One should be sensitive to others’ problems and have a selfless intent to serve others, in whatever way one can, to help the other person come out of his pain and miseries. Doing so, he will progress on the path of development.

To know more: https://www.dadabhagwan.org/self-realization/