If you want to understand the "New" Testament (NT), you have got to understand the "Old" Testament (OT). The OT has not been rendered invalid by the NT. It is important to remember that Jesus was Jewish and taught from the OT (only it wasn't called "old" then). Not only was Jesus a Jew, but in Philippians 3:5, Paul called himself "a Hebrew born of Hebrews". That means he was as Jewish as a Jewish person could get! So, if a bulk of the NT is comprised of the words of Jesus and the accounts of Jewish believers, with the exception of Luke, then it makes perfect sense that we take heed to know our OT.
An example recently came to my attention...
"Now while Jesus was at Bethany in the house of Simon the leper, a woman came to him with an alabaster jar of very costly ointment, and she poured it on his head as he sat at the table. But when the disciples saw it, they were angry and said, “Why this waste? For this ointment could have been sold for a large sum, and the money given to the poor.”
But Jesus, aware of this, said to them, “Why do you trouble the woman? She has performed a good service for me. For you always have the poor with you, but you will not always have me. By pouring this ointment on my body she has prepared me for burial. Truly I tell you, wherever this good news is proclaimed in the whole world, what she has done will be told in remembrance of her.” (Matthew 26:6-12)
Some have used these verses to dismiss the need to vigilantly help the poor. This is where ignorance of the OT becomes an issue. Jesus was teaching from the Torah! In this case He was not stating that we should ignore the poor and focus on Him; He was speaking to a specific case. In reality, He was referencing Deut. 15:11...
"Since there will never cease to be some in need on the earth, I therefore command you, 'Open your hand to the poor and needy neighbor in your land'."
This certainly does not sound like a command to ignore the poor! Without the understanding of the very text that Jesus Himself taught from, you will have a very limited understanding of the lessons He attempted to teach. Understanding the Jewish culture, along with a healthy study of the OT overall, will help enrich your understanding of the Gospel message.
A tree that is deeply rooted is difficult to uproot. A faith that is deeply rooted is difficult to overthrow. The roots of faith should extend deep into the OT for it is here that we find rich soil. The character of God is revealed in the OT. The lessons for life are found within these pages. It is in the OT that we find a wealth of nutrients to strengthen and nourish our faith. We must be willing to accept Scripture wholistically in order to understand the Gospel message.
In Hebrew, this means "our dance". It is through our dance that healing in found. Come before the throne and dance for your King!