What stressful events did rickey tell Robinson he would face in the major leagues?

Rickey Henderson told Jackie Robinson that he would face significant racial discrimination and hostility as he entered the major leagues. He warned Robinson about the intense scrutiny and pressure from fans, opposing players, and even teammates who might not accept him due to his race. Additionally, Rickey emphasized the need for Robinson to maintain his composure and resilience in the face of such adversity, as it would be crucial for his success and for breaking the color barrier in Baseball.