This famous saying appreciates one to have enough strength but regret to use that strength in tyrannical way. It is indeed, blessing to possess the physical and mental capabilities and talents. It becomes curse when are used to perform dictatorship or cruel activities.
One who is gifted with power of any type becomes liable to put his power in the right direction. Unfortunately, things take place opposite to that. Adolf Hitler who had the true leadership skills and guts haplessly, utilized his strength in persecution of Jews and the holocaust. On contrary, there was Holly Prophet(PBUH) who devoted his strength not only in uniting Muslim ummah but also in bringing others towards the religion. Where he could revenge for his sufferings, he wished amnesty to all.
Same is true for Alexander, the great. It is believed that he was that much powerful that if he had put his capabilities in order to bring peace in the world, he would have been successful. Like many others, he ran behind the lust of power and money. This apposite maxim is not limited to individuals only but also applies equally to nations and countries as well. As majority of world powers on behalf of their nuclear force or strong economy tries to take possession of weak states or play the game of dictatorship with them.
In short, the individuals as well as nations who are strong in any way will be better than many others only if they showcase their strength in proper and beneficial way. What a peaceful the world will be, if strength comes forward jointly to bring peace, unity and love in the world.