Holier Than Thou - Biblical Contradictions

Should Christians bear one another's burdens or just their own?

Galations 6:2, "Bear ye one another's burdens, and so fulfil the law of Christ." (KJV)

Galations 6:5, "For every man shall bear his own burden." (KJV)

According to Galations 6:2, we should bear one anothers burdens, however, according to version 6:5, we are to bear our own burdens.

"Sorrow is better than laughter: for by the sadness of the countenance the heart is made better. The heart of the wise is in the house of mourning; but the heart of fools is in the house of mirth." (Ecclesiastes 7:3-4, KJV)

"Then I commended mirth, because a man hath no better thing under the sun, than to eat, and to drink, and to be merry: for that shall abide with him of his labour the days of his life, which God giveth him under the sun." (Ecclesiastes 8:15, KJV)