This is really remarkable and true. God has His own unique way of expression. Majority of our body is made of water but when we are physically hurt in any part , water from the body manifests visibly as blood. In contrast when somebody hurts us emotionally , our heart is shattered and broken. Heart is full of blood but our feelings from heart find it’s reflection through eyes coming out as clear tears and not as blood. This is God’s way of providing outlet to our feelings. Flow of tears soothes our heart , negative feelings are forgotten and forgiven and We can start living a new day with clean slate and positive frame of mind.
Why do we close our eyes when we pray, cry, kiss or dream? 
Love like you have never been hurt 
Just moving on & getting over some relationships 
Have a good cry & wash out your heart