“I’m in great spirits at all times, Lamar Jackson writes. “If you know me, you know.” That’s good. But Deion Sanders has an idea that might lift those spirits even higher. Lamar Jackson doesn’t believe he needs an agent. But everybody could use some sage advice, and Deion Sanders is offering just that to the unsigned Baltimore Ravens star. “Stop explaining Yourself to fools and allow fools to be fools,” Deion wrote to Jackson via Twitter. “A brother trying that’s strong, believes in himself and willing to stand for what he believes will always be misunderstood & judged by fools…