The greatest thing we can possibly gain from this life is the ability to love, and to love greatly.
If you keep in mind that love and love alone is the reason for living, it will calm your heart and free you from your worries.
Life is a stream of happy and unhappy experiences, because that leads to Soul's purification. How do you get by in the dark times? Try to give love to someone, especially then.
In this world we are in precarious position, balanced midway between material and spiritual hungers. We find heaven to be a delicate state of consciousness that can be lost in a single moment of forgetfulness.