I read once that 90 per cent of what you worry about never comes to pass.
Unreasonable fears and worries suck the life out of you because you expend a ton of emotional and mental energy.
Wouldn't it be better to expend energy by taking action rather than passive worrying?
Worried about losing a job? Really apply yourself at work. Worried about your book not selling? Expend energy writing another book or promoting the one that has you worried.
Worried about your kids? Spend more time with them playing, talking, building bonds.
You can either expend your energy worrying or expend your energy tackling the problem. Far better to be a warrior, not a worrier.