Here is a quote from the 8/15/81 Pg 28-29 Watchtower (as referenced by the watchman link above)
13
In serving Jehovah "shoulder to shoulder," we need, as Zephaniah so often emphasizes, to cultivate the quality of meekness. When we make mistakes, as all imperfect humans do, let us be ready to acknowledge them, even as the "faithful and discreet slave," made up of imperfect fleshly men, has had to make corrections. However, let us never be critical of the grand body of truth that Jehovah has built up among his united people over the past 100 years, and which, by correction and adjustment, has come to shine ever more brightly on "the path of the righteous ones."Prov. 4:18.
14
From time to time, there have arisen from among the ranks of Jehovahs people those who, like the original Satan, have adopted an independent, faultfinding attitude. They do not want to serve "shoulder to shoulder" with the worldwide brotherhood. (Compare Ephesians 2:19-22.) Rather, they present a "stubborn shoulder" to Jehovahs words. (Zech. 7:11, 12) Reviling the pattern of the "pure language" that Jehovah has so graciously taught his people over the past century, these haughty ones try to draw the "sheep" away from the one international "flock" that Jesus has gathered in the earth. (John 10:7-10, 16) They try to sow doubts and to separate unsuspecting ones from the bounteous "table" of spiritual food spread at the Kingdom Halls of Jehovahs Witnesses, where truly there is nothing lacking. (Ps. 23:1-6)
They say that it is sufficient to read the Bible exclusively, either alone or in small groups at home. But, strangely, through such Bible reading, they have reverted right back to the apostate doctrines that commentaries by Christendoms clergy were teaching 100 years ago, and some have even returned to celebrating Christendoms festivals again, such as the Roman Saturnalia of December 25! Jesus and his apostles warned against such lawless ones.Matt. 24:11-13; Acts 20:28-30; 2 Pet. 2:1, 22
The BOLDing is mine, but as you can see, although they will tell you that you should 'read' the bible, what they do not tell you is that you should interpret the bible ONLY their way, and you NEED their literature to interpret it correctly!!!!.. You CANNOT let the bible speak for itself, as if you do, you will be an apostate. And trust me, some of their doctrines are a far stretch from what the bible actually says.
In the example you gave above, the 144,000; They believe that the # is literal, however, they throw out that the 144,000 are made up of Virgin Male Jews. I.E. Anyone can be an annointed.
Good luck on your quest for truth.. Remember the scripture that says to test everything, and to hold on to what is good and true.. Test what they tell you.. Ask questions, research, etc...