In the light of the above mentioned Hadiths, wearing amulets is impermissible. It is a form of minor Shirk (associating others in worship with Allah). It may also be a form of major Shirk, if they are used to ward off evils without Allah's help. On the other hand, if a person thinks that wearing amulets is a cause of recovery, it is minor Shirk. It is obligatory to remove and tear the amulets. Swearing by anyone or anything other than Allah is impermissible and involves minor Shirk. It may also involve major Shirk when the person who swears by anyone other than Allah thinks that the one by whom he swears is like Allah, qualified to be invoked instead of Allah, or to control the universe. This is major Shirk, may Allah protect us.
To sum up, it is not permissible to swear by anyone or anything other than Allah. The Prophet (peace be upon him) said, Whoever swears, let him swear by Allah or keep silent. and Do not swear by your fathers, or by your mothers, or by rivals to Allah; He (peace be upon him) also said, Whoever swears by anything other than Allah has committed kufr or shirk. Another narration reads, Whoever swears by anything other than Allah has committed shirk. He (peace be upon him) said, Whoever swears by honesty is not one of us. These are all authentic reports from the Prophet (peace be upon him).
One day, the Prophet (peace be upon him) heard his Sahabah (the Prophet's Companions) while they were swearing by their fathers. He (peace be upon him) said, Verily! Allah forbids you to swear by your fathers. If one has to take an oath, he should swear only by Allah or otherwise keep quiet. The Imam Abu `Umar Ibn `AbdulBar (d. 463 A.H.) (may Allah be merciful with him) stated that the scholars unanimously agreed that swearing by anyone or anything other than Allah is impermissible. Therefore, swearing by honesty or by the Prophet (peace be upon him), by Ka`bah, or by the life or honor of soandso is not permissible. One may swear by Allah alone. Allah is the One Who grants success.