Every person addicted to the drug, started off with that first "line" or "hit" or "bump" or "slam" of meth.
The initial high is so euphoric and intense, if the stuff is available to you, you will likely try "just one more" and the cycle begins. Once addicted, it will be a lifelong battle to get off of it and to remain sober. Stay strong and avoid it. If you've done it, heed the warning.