The Father loves the Son and has entrusted everything to him
John the Baptist said to his disciples:
‘He who comes from above is above all others;
he who is born of the earth is earthly himself
and speaks in an earthly way.
He who comes from heaven
bears witness to the things he has seen and heard,
even if his testimony is not accepted;
though all who do accept his testimony
are attesting the truthfulness of God,
since he whom God has sent
speaks God’s own words:
God gives him the Spirit without reserve.
The Father loves the Son
and has entrusted everything to him.
Anyone who believes in the Son has eternal life,
but anyone who refuses to believe in the Son will never see life:
the anger of God stays on him.’
Source: Jerusalem Bible
Catechism of the Catholic Church
The necessity of faith
161 Believing in Jesus Christ and in the One who sent him for our salvation is necessary for obtaining that salvation. “Since “without faith it is impossible to please [God]” and to attain to the fellowship of his sons, therefore without faith no one has ever attained justification, nor will anyone obtain eternal life ‘But he who endures to the end.'”
Perseverance in faith
162 Faith is an entirely free gift that God makes to man. We can lose this priceless gift, as St. Paul indicated to St. Timothy: “Wage the good warfare, holding faith and a good conscience. By rejecting conscience, certain persons have made shipwreck of their faith.” To live, grow and persevere in the faith until the end we must nourish it with the word of God; we must beg the Lord to increase our faith; it must be “working through charity,” abounding in hope, and rooted in the faith of the Church.
Rejoice, you just, in the LORD; praise from the upright is fitting.
Give thanks to the LORD on the harp; on the ten-stringed lyre offer praise.
Sing to God a new song; skillfully play with joyful chant.
For the LORD’S word is true; all his works are trustworthy.
The LORD loves justice and right and fills the earth with goodness.
By the LORD’S word the heavens were made; by the breath of his mouth all their host.
The waters of the sea were gathered as in a bowl; in cellars the deep was confined.
Let all the earth fear the LORD; let all who dwell in the world show reverence.
For he spoke, and it came to be, commanded, and it stood in place.
The LORD foils the plan of nations, frustrates the designs of peoples.
But the plan of the LORD stands forever, wise designs through all generations.
Happy the nation whose God is the LORD, the people chosen as his very own.
From heaven the LORD looks down and observes the whole human race,
Surveying from the royal throne all who dwell on earth.
The one who fashioned the hearts of them all knows all their works.
A king is not saved by a mighty army, nor a warrior delivered by great strength.
Useless is the horse for safety; its great strength, no sure escape.
But the LORD’S eyes are upon the reverent, upon those who hope for his gracious help,
Delivering them from death, keeping them alive in times of famine.
Our soul waits for the LORD, who is our help and shield.
For in God our hearts rejoice; in your holy name we trust.
May your kindness, LORD, be upon us; we have put our hope in you.
Source: The New American Bible