Vulnerable is to be susceptible to physical or emotional attack or harm.
This is my commandment, that you LOVE one another as I have LOVED you. GREATER love has no one than this, that someone lay down his life for his friends. You are my friends if you do what I commanded you. No longer do I call you servants, for the servant does not know what his master is doing, but I have called you friends, for all that I have heard from my father I have made known to you.
Love is patient and kind; love does not envy or boast; it is not arrogant or rude. It does not insist on its own way; it is not irritable or resentful; it does not rejoice at wrongdoing, but rejoices with the truth. Love bears all things, believes all things, hopes all things, endures all things. Love never ends. As for prophecies, they will pass away; as for tongues, they will cease; as for knowledge, it will pass away. For we know in part and we prophesy in part, but when the perfect comes, the partial will pass away. When I was a child, I spoke like a child, I thought like a child, I reasoned like a child. When I became a man, I gave up childish ways. For now we see in a mirror dimly, but then face to face. Now I know in part; then I shall know fully, even as I have been fully known. So now faith, hope, and love abide, these three; but the greatest of these is love.