The word Trinity is not in the Bible
Some critics of the Trinity doctrine claim that since the word "trinity" is not found in the Bible, it isn't true. Furthermore, some assert that if God wanted us to believe in the Trinity He would have stated the doctrine clearly.
First of all, it is illogical to claim that since the word "Trinity" is not found in the Bible that its concept is not taught therein. This kind of objection usually demonstrates a prejudice against the teaching of the Trinity. Instead, the person should look to God's word to see if it is taught or not.
Second, there are many biblical concepts that people believe in that don't have a specific word describing them used in the Bible. For example, the word "bible" is not found in the Bible, but we use it anyway to describe the Bible. Likewise, the words "omniscience," which means "all knowing," "omnipotence," which means "all powerful," and "omnipresence," which means "present everywhere," are words not found in the Bible either, but we use them to describe the attributes of God. We don't have to see a specific word in the Bible in order for the concept it describes to be true.
Following are other words that the Bible does not use but the concepts are mentioned.
Atheism is the teaching that there is no God. "The fool has said in his heart, "There is no God" (Psalm 14:1).
Divinity which means divine quality or godlike character. Yet, we speak of the godlike quality of the Lord God. See Psalm 139.
Rapture is the teaching that the Christians who are alive when Jesus returns will be caught up to meet Him in the air (1 Thess. 4:16-18).
So, to say that the Trinity isn't true because the word isn't in the Bible is an invalid argument. Furthermore, to say that if God wanted us to believe in the Trinity He would have clearly taught it in scripture, is also an invalid argument. Something does not have to be clearly formulated in the Bible to be valid. Not all things taught in the Bible are perfectly clear. Take a look at the book of Revelation. It contains many things that are cryptic that must be interpreted after examining all of the Bible. Even then, there are disagreements as to what some things mean. Yet, we know that the truths there are true whether or not we discover them.
Nevertheless, there are scriptures that demonstrate a Trinitarian aspect.