Act I - ghost encounter

Hamlet's first encounter with his father's ghost mirrors the resurrection of Christ.

"Why thy canonized bones, hearsed in death,
Have burst their cerements, why the sepulcher*
Wherein we saw thee quietly inurned
Hath oped his ponderous and marble jaws,
To cast thee up again." (47-51)

Not only the scene, but also the language carries an extremely religious tone. "thy canonized bones."
It's interesting to put this scene in a religious context because then one realizes that the Father, Son, and (Holy) Ghost/Spirit come together all in one, under the name Hamlet. King, Prince, and Ghost.
Father/son relationships echo in To The Lighthouse and the Bhagavad Gita as well, taking an interesting twist in the Bhagavad Gita. James feels no obligation whatsoever towards his father; in fact, he'd like to kill him (though he does essentially just desire approval from his father.) Hamlet passionately desires to avenge Claudius in his father's name. Arjuna, however finds himself facing battle, restrained under the bonds of filial piety, the ultimate duty and devotion to one's father, family, and people above all else. Trying to listen to two opposites in his religious path, Arjuna feels conflict. How does one choose between Krishna and the values of filial piety taught from a young age? In eastern culture, respect for one's father is the very very highest virtue attainable.
Sadly, the respect for filial relationships seems to have deteriorated over the centuries. Strong ties remain between father/son, but James, for example, feels no pity for his father simply because he is his father. Rather, James judges his father only as a person, with no bias for his role as father.

Just a picture I looked up when Hamlet says that his fate makes his strength as great as the Nemean Lion's: