The energy we pass on to other people is quite essential, and the more aware of it we are the more essential it is. People by not believing in it and not thinking about it tend to avoid the effects of giving and taking up to a certain extent, their thoughts get lost in translation unless they are really pissed about someone or really love someone, similarly they receive less good energy if someone loves them and are unable to block bad energy that someone gives them.
Before learning how to absorb good energy, deflect bad energy(not with crystals) but with meditation and prayer as a last resort, one needs to be able to learn how to control his own mood swings, once you can master your own mood swings then you can move on to the next stage.
Typically in christianity, the fall back prayer is the padre nostro, it's a good prayer that puts your mind at ease once repeated a few times and through practice one gets better at essentially putting himself at ease.
The next stage after the padre nostro are the secret prayers of the Madonna, the evil eye prayers which are passed orally alone from male to female and vice-versa. These are used to take the evil eye away from someone and into you so that you can free them from the burden. This includes a
physical test at the end of the session to double-check if the operation was a success or not, though for the healer it is quite evident regardless but it is used in case the healed is a sceptic.
The next stage after the that are the
prayers of St Cyprian(difficult to find in English, that link is one of his prayers, not the particular one though), that is more powerful staff.
EN EL ED EM ON
...take your common sense with you, and leave your prejudices behind...