God sent His only Son Jesus Christ to die on the Cross because He loves us, not because we love Him. However, in return God commands us to love Him back. Jesus Christ dying on the Cross does not save everyone in the whole world from damnation. In order to be saved, people must first give their whole hearts and lives to Him. When we do this, God sends His Holy Spirit to reside in each of us as our Helpmate, and it is the Holy Spirit we rely on to be transformed into the image of Jesus Christ.
"I will ask the Father,
and He will give you another Helper,
that He may be with you forever;
that is the Spirit of truth,
whom the world cannot receive,
because it does not see Him
or know Him,
but you know Him
because He abides with you
and will be in you."
John 14:16-17 (NIV)
The Holy Spirit is described in Scripture as the Spirit of wisdom and understanding, the Spirit of counsel and strength, the Spirit of knowledge and the fear of the Lord.
"The Spirit of the Lord will rest on Him,
The Spirit of wisdom and understanding,
the Spirit of counsel and strength,
the Spirit of knowledge and the fear of the Lord."
Isaiah 11:2 (NIV)
We are not alone. We have God's Holy Spirit to give us the wisdom, understanding, counsel, strength, knowledge and fear of the Lord, so we can live for God and be His witnesses.