The quote is saying some people are good and they will be by your side forever and will always help you in times of need however some people are bad and they will use you and not help you in any way. Pick them wisely means pick someone who is a good person and doesnt have any bad intentions
This quote is clearly saying that some people inspire you, make you happy , always be with you and be a true friend . But some people just use you for your money , waste your time in which you can do something useful and are never with you when you need them. That’s why choose friends or any person wisely
