"And Jacob called unto his sons" (Genesis 49:1). The Torah records the great final blessing — all twelve sons gathered around the dying patriarch, each receiving something tailored to his nature and destiny. The midrash asks a question that goes unasked in the text: why did Esau not gather his sons for a final blessing the way Jacob did? He was the firstborn. He had sons too. Why did only Jacob do this?
The answer is about murder. In the rabbinic tradition, Esau killed. He had blood on his hands — most famously in the legend that he killed Nimrod and took his garments (Pirkei DeRabbi Eliezer 24). A murderer does not know when justice will find him, does not know when his own end will come. He cannot stage-manage a peaceful deathbed. The right to gather your children and bless them before dying is reserved for those who have lived in a way that creates a deathbed. Esau lived at the knife's edge. Jacob lived at the altar.
The twelve blessings Jacob gave at his deathbed are not predictions so much as characterizations — Judah the lion, Dan the serpent, Joseph the fruitful vine. Jacob had watched his sons their entire lives. The blessings come from that watching, from decades of attention. He knew who they were. The ability to see your children clearly enough to bless them specifically is itself a gift — and the midrash implies it is a gift that violent men cannot receive.