"You can't put your foot in the same river twice..." Heraclitus
While I'm here, let me say this about that. Life doesn't seem fair in many respects. Why do some people become movie stars while others are beset by tragedy and struggle? Why are people born with disabilities, or contract terrible illnesses? Why do young children die of incurable diseases?
Because each soul is receiving the precise instruction necessary for their personal evolution. Fundamentally, every life is tragic at the level of mortality. That's one of the reasons why we're here, to break through this form into the Eternal. The tragedies or disabilities are more or less tragic or disabling dependent on the energy they're fed. Some of the most grievous disadvantages are invisible from the outside. Some movie stars are beset by terrible tragedies and struggles. Some laborers are the most serene and contented people on the planet. Some fashion models are suicidal. Some paraplegics shine happiness like the sun.
Have you ever noticed that small children succumbing to terminal illnesses often have the quality of a loving and benevolent teacher, perfect in their wisdom, as serene and knowing in their surrender to The Eternal as the wisest ascended master? They are just what they appear to be. By that point, they can only be exactly what they are. They're only here briefly because they have that one little thing left to do. Maybe just to release fear one last time. It's like they've come back to make sure they turned off the coffee.
Be sad, experience feeling sad, let it's energy move through you until it passes and you come back. Then stop energizing it and energize joy. When the sun sets here, it's always rising somewhere else. It's always there, we are turning to face it.
"If you open yourself to the Tao, you are at one with the Tao and you can embody it completely. If you open yourself to insight, you are at one with insight and you can use it completely. If you open yourself to loss, you are at one with loss and you can accept it completely."
The Tao Te Ching, 23