There is a link between our physical and verbal actions and emotions. If, instead of anger, hatred and suspicion, we are moved by loving-kindness, we will naturally have greater respect for others and our actions will be non-violent.
There are always problems to face, but it makes a difference if our minds are calm. On the surface we may get upset, but it makes a difference if we are able to stay calm in the depths of our minds.
Not only is it the case that happy people are more willing to help others, but as I generally point out, helping others is the best way to help yourself, the best way to promote your own happiness. It is you, yourself, who will receive the benefit.